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| author |   Karol Herbst <kherbst@redhat.com> | 2019-06-18 13:01:33 +0200 |
|---|---|---|
| committer |   Ben Skeggs <bskeggs@redhat.com> | 2019-07-19 16:26:51 +1000 |
| commit | 68bf8b577977a2804af82ffe03ce25d952f82fd2 (patch) | |
| tree | 3d2d9863b5fcb0a2f11556f007e18878c26ec600 | |
| parent | drm/nouveau: fix bogus GPL-2 license header (diff) | |
| download | linux-dev-68bf8b577977a2804af82ffe03ce25d952f82fd2.tar.xz linux-dev-68bf8b577977a2804af82ffe03ce25d952f82fd2.zip | |
drm/nouveau/hwmon: return EINVAL if the GPU is powered down for sensors reads
fixes bogus values userspace gets from hwmon while the GPU is powered down
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Rhys Kidd <rhyskidd@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_hwmon.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_hwmon.c b/drivers/gpu/drm/nouveau/nouveau_hwmon.c index 08a1ab6b150d..6af2d299c3f9 100644 --- a/drivers/gpu/drm/nouveau/nouveau_hwmon.c +++ b/drivers/gpu/drm/nouveau/nouveau_hwmon.c @@ -428,6 +428,8 @@ nouveau_temp_read(struct device *dev, u32 attr, int channel, long *val) switch (attr) { case hwmon_temp_input: + if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) + return -EINVAL; ret = nvkm_therm_temp_get(therm); *val = ret < 0 ? ret : (ret * 1000); break; @@ -474,6 +476,8 @@ nouveau_fan_read(struct device *dev, u32 attr, int channel, long *val) switch (attr) { case hwmon_fan_input: + if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) + return -EINVAL; *val = nvkm_therm_fan_sense(therm); break; default: @@ -496,6 +500,8 @@ nouveau_in_read(struct device *dev, u32 attr, int channel, long *val) switch (attr) { case hwmon_in_input: + if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) + return -EINVAL; ret = nvkm_volt_get(volt); *val = ret < 0 ? ret : (ret / 1000); break; @@ -527,6 +533,8 @@ nouveau_pwm_read(struct device *dev, u32 attr, int channel, long *val) *val = therm->attr_get(therm, NVKM_THERM_ATTR_FAN_MODE); break; case hwmon_pwm_input: + if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) + return -EINVAL; *val = therm->fan_get(therm); break; default: @@ -548,6 +556,8 @@ nouveau_power_read(struct device *dev, u32 attr, int channel, long *val) switch (attr) { case hwmon_power_input: + if (drm_dev->switch_power_state != DRM_SWITCH_POWER_ON) + return -EINVAL; *val = nvkm_iccsense_read_all(iccsense); break; case hwmon_power_max: |